To move back the centre origin point to were the object is
Select the object in question.

Tab to enter edit mode.

A to select all (You may have to hit it twice)

Shift + S >> U To set the 3D Cursor to the average locational center of your selection.

Tab To exit edit mode.

Ctrl + Shift + Alt + C >> T To set the Origin to the new location of the 3D cursor.